Incipient Cracks in the Glass Menagerie

In an interview with “Scientific American”, Prof. Rana X. Adhikari remarked that LIGO has “just made a machine that has given humanity a new sense, beyond the usual five”. In this conversation, we discuss how our new ability to hear and feel the bending of spacetime “with these brand-new gravitational fingers” is cracking the glass of our perceptual limits, and attempt to envision what other, yet unknown limits continue to determine what we can and cannot know.